Riverside Resources Inc.
TSX VENTURE : RRI
PINK SHEETS : RVSDF
FRANKFURT : R99

Riverside Resources Inc.

May 31, 2011 04:20 ET

Riverside Resources and Partner Guerrero Exploration Inc. to Commence Drilling at the Chapalota Project in Sinaloa, Mexico

VANCOUVER, BRITISH COLUMBIA--(Marketwire - May 31, 2011) -Riverside Resources Inc. ("Riverside" or the "Company") (TSX VENTURE:RRI)(PINK SHEETS:RVSDF)(FRANKFURT:R99) has completed third phase exploration work and received new IP geophysical data that improves the definition of several drill ready exploration targets at the Chapalota Project in Sinaloa, Mexico. Riverside is pleased to announce that drill testing will commence in June at the Leona target area which is one of the high priority targets on the project. The Leona target was previously defined by Riverside through geological mapping and rock chip sampling that identified a north-south trending fault carrying gold values up to 32.1 g/t gold. Riverside and its partner, Guerrero Exploration Inc., have since completed an extensive Induced Polarization (IP) survey and taken the necessary steps to commence drilling in the coming weeks.

The IP pole-dipole survey was initiated to delineate the orientation of the fault under cover. Seven 2 km lines of IP have been completed at 300m spacing, for a total of 14 km's over the Leona target area. Initial results indicated an east dipping conductive zone that is interpreted to define the fault. Due to the indicated success of IP in detecting the fault under cover, the extent of the survey has been doubled for another seven lines of which three have been surveyed. This data is invaluable for positioning drill hole collars to test for mineralization along the extent of the fault. A bulldozer is now on site improving drill access. Also, an excavator is trenching across the trend of the mineralized structure to expose rock for better geological control of drill hole collar locations. Geology that can be mapped in trenches will assist with interpretation of the drill sections. Major Drilling has been contracted to commence drilling at Chapalota in early June using a man portable diamond drill.

"The recently completed IP work is very encouraging as it has helped substantiate and focus the upcoming drill program and provides Riverside shareholders with significant potential for discovery," said John-Mark Staude, President and CEO of Riverside Resources.

Assaying and Qualified Person:

The scientific and technical data contained in this news release were prepared under the supervision of Locke Goldsmith, P. Eng., P. Geo., an independent qualified person to Riverside Resources, who is responsible for ensuring that the geologic information provided in this news release is accurate and acts as a "qualified person" under National Instrument 43-101 Standards of Disclosure for Mineral Projects.

About Riverside Resources Inc.:

Riverside is a well-funded prospect generation team of focused, proactive gold discoverers with the breadth of knowledge to dig much deeper. The Company currently has approximately $10,000,000 in the treasury and fewer than 34,000,000 shares issued. Riverside`s model of growth through partnerships and exploration looks to use the prospect generation business approach to own resources, while partners share in de-risking projects on route to discovery. Additional property information on the Company's projects can be found on the Riverside Resources Inc. website at www.rivres.com.

ON BEHALF OF RIVERSIDE RESOURCES INC.

Dr. John-Mark Staude, President & CEO

Certain statements in this press release may be considered forward-looking information. These statements can be identified by the use of forward looking terminology (e.g., "expect"," estimates", "intends", "anticipates", "believes", "plans"). Such information involves known and unknown risks -- including the availability of funds, the results of financing and exploration activities, the interpretation of exploration results and other geological data, or unanticipated costs and expenses and other risks identified by Riverside in its public securities filings that may cause actual events to differ materially from current expectations. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

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